{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:HKNSI35A5R2EWXV2SMSNFQFNVE","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"86c4c57b0f2afae6b16a7afc4c0aaa9f0010aab12a408f7de01aa659a740a56e","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-07-21T09:27:17Z","title_canon_sha256":"a295bba6bc0b1d81736ce374af91fe27d37db60d8857448aa82b146822eadb84"},"schema_version":"1.0","source":{"id":"1207.5112","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1207.5112","created_at":"2026-05-18T01:56:15Z"},{"alias_kind":"arxiv_version","alias_value":"1207.5112v1","created_at":"2026-05-18T01:56:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1207.5112","created_at":"2026-05-18T01:56:15Z"},{"alias_kind":"pith_short_12","alias_value":"HKNSI35A5R2E","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_16","alias_value":"HKNSI35A5R2EWXV2","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_8","alias_value":"HKNSI35A","created_at":"2026-05-18T12:27:09Z"}],"graph_snapshots":[{"event_id":"sha256:7768945f7d4586ef141a0735a4ddb1c58dbad9609778c2f5e99ba79093d195fa","target":"graph","created_at":"2026-05-18T01:56:15Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We report on the discovery of large-amplitude flickering from V648 Car (= SS73-17), a poorly studied object listed amongst the very few hard X-ray emitting symbiotic stars. We performed milli-magnitude precision optical photometry with the Swope Telescope at the Las Campanas Observatory, Chile, and found that V648 Car shows large U-band variability over time scales of minutes. To our knowledge, it is amongst the largest flickering of a symbiotic star ever reported. Our finding supports the hypothesis that symbiotic WDs producing hard X-rays are predominantly powered by accretion, rather than q","authors_text":"1), (2) Sydney Institute for Astronomy, 3, (3) Australian Astronomical Observatory, 4), (4) Las Campanas Observatory, (5) Universidade Federal do Rio Grande do Norte, (6) INAF - Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna, Australia, Brasil, C.E. Ferreira Lopes (5, Chile, F. Di Mille (2, Italy), N. Masetti (6) ((1) Departamento de Astronomia y Astrofisica, Pontificia Universidad Catolica de Chile, R. Angeloni (1), The University of Sydney","cross_cats":["astro-ph.HE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-07-21T09:27:17Z","title":"Discovery of fast, large-amplitude optical variability of V648 Car (=SS73-17)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1207.5112","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:36001655ca496a195bb1b199a24648ae44d3e4517128666c1c6d86d9823ac6b5","target":"record","created_at":"2026-05-18T01:56:15Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"86c4c57b0f2afae6b16a7afc4c0aaa9f0010aab12a408f7de01aa659a740a56e","cross_cats_sorted":["astro-ph.HE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.SR","submitted_at":"2012-07-21T09:27:17Z","title_canon_sha256":"a295bba6bc0b1d81736ce374af91fe27d37db60d8857448aa82b146822eadb84"},"schema_version":"1.0","source":{"id":"1207.5112","kind":"arxiv","version":1}},"canonical_sha256":"3a9b246fa0ec744b5eba9324d2c0ada900f9f923b26ee10bfa191897b4a5ad35","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3a9b246fa0ec744b5eba9324d2c0ada900f9f923b26ee10bfa191897b4a5ad35","first_computed_at":"2026-05-18T01:56:15.426296Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:56:15.426296Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7LjCL1Yjj7BfZ/8JXv3quwkyeJKnpLHSRopmuCFI9uWN+3YIKlE58kFumiVq67R+VcLEOJ3VyAGKU4+Xib+YBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:56:15.426978Z","signed_message":"canonical_sha256_bytes"},"source_id":"1207.5112","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:36001655ca496a195bb1b199a24648ae44d3e4517128666c1c6d86d9823ac6b5","sha256:7768945f7d4586ef141a0735a4ddb1c58dbad9609778c2f5e99ba79093d195fa"],"state_sha256":"868c2c6180f667a1da24a78cfe198d6f1abf2571f3c14291bbfa30aa3af04b3f"}